Automatic-cut-off sawing-machine.



No. 702,360. 4Patnted lune I0, |902.

W. M. DWIGHT. AUTOMATIC CUT-OFF SAWlNG'MABHINE.

(Application led Jan. 30, 1902A (No Model.)

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y hands of the operator shall be free to feed the UNITED STATES PNPENTx FFICE.

WILLIAM M. DWIGHT, OF DETROIT, MICHIGAN.

AUTOMATIC-CUT-OFF SAWlNG-IVIACHINE. i

SPECIFICATION forming part of Letters Patent No. 702,350, dated V.Tune 10, 1902,.

Application filed January 30, 1902. Serial NoVl 91,846. (No modeld i i To all whom t nung concern: y

Be it known that I, WILLIAM M. DWIGHT, a citizen of theUnited States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Automatic-Cut- O Sawing-Machines, of which the following is a specificatiomreference being had therein to the accompanying drawings.

n This inventionrelates to new 'and usefulv improvements in sawing-machines, and has for its object to make a machine which will automatically cut off ,the material to be cut into regular lengths and which will clamp the work to be cut in advance of the-saw and hold the same while being sawed, so that both material.

culiar construction of clamping-finger and drive mechanism therefor, whereby both the` saw-carriage and inger are driven from-the same common shaft. I

The invention' furtherconsists in the peculiar constructionarrangement, and combination of parts, all as more fully hereinafter described and claimed in the specification and shown in the accompanying drawings, in which Figure lis a plan view of my machine; Fig.

2, a vertical central section therethrough; Fig.

3, a horizontal section through the clamping-` finger.

As shown in the drawings, A is the frame,

B the feed-table,- and Cthe sliding carriage .mounted upon the guide-rails B of the frame and carrying the saW-arborrC, mounted in suitable bearings, driven through the mediu rn of a belt D and belt-tightener E to take up the slack therefrom as the saw swings back and forth, all of usual and well-known-construction and forming no part of my invention,

which consists in positively driving the sawcarriage forward and back without the intervention of any foot-lever or other means and in providing means for automatically clamping the material to be sawed in advance of the saw and holding it while being cut, so that both hands of the operator shall be free to feed the material. To this end I mount a shaft F in bearings F' inV rear of the machine, said shaft being provided at one end with a crank-disk G, pivotally connected, by means of the pitman C2, to the saw-carriage C, and at its opposite end said shaft is provided with a drive-pulley G', connected withithe drive mechanism to impart a reciprocating movement to the saw-carriage.

H is a cam formed on one side of the crankdisk, and I is a horizontal rod mounted in bearings I on the feed-table and frame and Aprovided at one end with an antifriction-wheel l2, traveling in contact with the face of said cam-wheel and provided 'at its opposite end with a suitable oifset portion Vcarrying a tubularsleeve a, in which is mounted the finger l), provided with a screw-threaded shank and adjusting-nut c, acoil-spring d being sleeved on theushank of said finger to yieldingly hold said finger, a coil-spring e being connected to saidrod and frame, respectively, at its opposite ends for holding the friction-wheelin contact with the cam, the cam and crankpin being so placedin relation to each other that the spring-finger will clamp the strip of wood f against the stop J just before the saw begins cutting and hold it there until after the .saw'has commenced its return movement,

and as these strips are usuallycut into short lengths and these machines run at a very high rate of lspeed it will be seen that it will keep an operator busy simply feeding in the strips to be cut off, while in the present machines the operator has to place the strip in position and hold it against the stop and then press upon a foot-lever, when the saw would advance, a suitable counterweight being provided for returningit;

It will be seen that by yieldingly mounting the finger b in the sleeve a a nicety of adjustment is not required, as any lostvmotion or variation in the material Will be `taken upby the spring presser-finger. I l

lVhat l claim as my invention isl. In a device of the character described, the combination with the frame formed with guides and a feed-table secured thereto and located above the said frame-guides, of a IOO shaft journaled in the frame, a cam andcrank disk upon the shaft, means for rotating said shaft, a saw-carriage mounted in the said guides of the frame below the said feed-table, a rod connecting said saw and disk, a second rod cooperating with said cam and having its forward end mounted in bearings on the upper face of the feed-table, a yielding finger secured to the'forward end of said second rod, a stop on said feed-table against which said finger is adapted to clamp the material to be cut, said inger and carriage being driven from a common shaft in timed relation to each other. y

2. In a device of the character described, the combination with the main frame formed with guides, of a saw-carriage mounted in said guides, a shaft and actuating means therefor, a cam-disk carried by said shaft, a rod connecting said disk and carriage, a secondl rod extending above the saw-carriage and at one end carrying an antifriction-wheel traveling in rolling contact with said cam and bent at its other end at an approximate right WILLIAM M. DWIGHT.

Witnesses:

OTTO F. BARTHEL, LEWIS E. FLANDERS. 

